The following highways are numbered 590:
| Preceded by 589 | Lists of highways 590 | Succeeded by 591 |
State Route 590 is a north–south state highway in the northwestern portion of the U.S. state of Ohio. The southern terminus of SR 590 is at a signalized intersection with SR 12 in the village of Bettsville. Its northern terminus is at a T-intersection with SR 2 just south of Ottawa National Wildlife Refuge, and approximately 5 miles (8.0 km) north of Rocky Ridge.
State Route 6 (SR 6) is a state highway that is unsigned. It travels through the central part of the U.S. state of Tennessee from Lawrence County to Sumner County. The highway is related to the following U.S. Highways:
Pennsylvania Route 237 (PA 237) was an 3.88-mile (6.24 km) route between PA 37 and PA 590 in Lackawaxen to an intersection with PA 137 in Shohola Township. The route followed the shores of the Delaware River as Lackawaxen Road. The route's alignment, after assignment in 1928, remained the same until being removed from the state highway system in 1946. The route was paved in 1932, and the route is now known as State Route 1012 and Shohola Township Roads 413 and 454.
State Road 590 is an east–west commercial and commuter highway serving central Pinellas County, within Clearwater and Safety Harbor. It runs from running from Alt US 19 in Clearwater east to State Road 580 in Safety Harbor, and is a scenic route in much of Safety Harbor.
